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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood
stag
penis proper
hypothalamus and pituitary gland
Dairy Cattle Lactation (standard)
2. 147 days
ewe gestation
Hard
cervix
Dairy Cattle Gestation
3. 4-6 days
mare estrus
burdizzo
age and castration
normal presentation of the fetus
4. 2 month growth cycle. stored in the epididymis of the bull
mare estrus cycle
Sperm growth rate
sertoli cells
#1 cost in production
5. Luteolysis happens because of the ____________ hormone
prostaglandin
prostate gland
effects of estrogen
sertoli cells
6. 14-19 (17) days
#1 cost in production
reasons for castration
prostaglandin
ewe estrus cycle
7. What makes the milk flow through the mammary glands?
behavioral signs of estrus
cow estrus cycle
6-8 weeks
Blood
8. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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9. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
mare ovulation
feeding a high producing dairy cow
eminal vesicles
ewe's estrous cycle
10. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
rectal palpation (BSE)
growth lost from castration methods (knife & band)
1. more cost effective - 2. powdered milk is in excess production
11. The more stressed out the male is - the less sperm he is going to produce
Avg. bull specs
Lutinizing Hormone in males
ewe estrus
humans: stress level vs sperm
12. (switzerland) 2nd in size and milk production - most muscle -
what has to happen for males for copulation to occur
prostate gland
retractor muscles
Brown Swiss Cow
13. Front feet and head first. (except for hogs and dogs)
Avg. bull specs
normal presentation of the fetus
Follical Stimulating in females
accessory sex glands
14. Failure to have one testis (gonad) to descend
urethra
monorchid
mare's estrous cycle
dairy cattle pregnancy check
15. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
prostate gland
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
scrotal circumference (BSE)
libido test (BSE)
16. Why does estrus happen before ovulation?
functions of progestrone
cow ovulation
sow gestation
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
17. Days which have increasing daylight hours
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18. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
burdizzo
sow estrus
Where livelihood is in agriculture
19. (FSH) causes egg to mature in females
reason for seasonal breeding periods
sow ovulation
Follical Stimulating in females
rectal palpation (BSE)
20. Microscopic - make sure not sterile - very few bulls are actually tested
reasons for castration
pelvis
kidney stones also called ________ ___________ can develop in the sigmoid flexure
semen evaluation (BSE)
21. What about the sperm for a bull which has been castrated but still has testicles?
pelvis
Culls bulls earlier (2 reasons)
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
semen evaluation (BSE)
22. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
oviducts
effects of estrogen
rectal palpation (BSE)
penis and prepuce observation (BSE)
23. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.
Avg. bull specs
~1 month
penis sizes vs delivering methods
functions of progestrone
24. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
mare's estrous cycle
prostate gland
mare ovulation
humans: stress level vs sperm
25. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
ewe estrus
what has to happen for males for copulation to occur
Sperm growth rate
Jersey Cow
26. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
seminiferous tubules
feeding a high producing dairy cow
ewe's estrous cycle
visual evaluation (BSE)
27. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
reasons for castration
prostate gland
reason for seasonal breeding periods
stag
28. Sperm is produced here
purpose of Breeding Soundness Exam (BSE) for males
dairy cattle pregnancy check
seminiferous tubules
estrous
29. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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30. Days which have decreasing daylight hours
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31. Parturition is controlled by...
Hormones from both the fetus and the mom.
uterus
Grading choice
age and castration
32. Failure to have both testis (gonads) descend
cowper's gland
Hard
cryptorchid
sertoli cells
33. ~305 days (altough often longer due to breeding difficulties)
Parturition
Dairy Cattle Lactation (standard)
what has to happen for males for copulation to occur
femininity of a heifer
34. Implies the amount of estrogen production
hormones
penis proper
Hard
femininity of a heifer
35. Milk ~305 days - dry 60 days prior to calving
Mares
Dairy Cattle milking schedule
penis sizes vs delivering methods
estrous
36. ~60 days before calving
dry-off time in dairy cattle
seminiferous tubules
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
~1 month
37. Scar tissue plugs up chambers of udder
hormones
butterfat
mastitis
vulva
38. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.
dartos muscle
Reasons for gestation length being affected
Holstein Cow
polyestrous
39. (LH) stimulates the Leydig cells to produce testosterone
Dairy Cattle milking schedule
6-8 weeks
van deferens
Lutinizing Hormone in males
40. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract
#1 cost in production
Parturition
eminal vesicles
effects of BST
41. 24 hours before end of estrus cycle
sow estrus cycle
Holstein Cow
mare ovulation
scrotal circumference (BSE)
42. 1. brain function - 2. blood flow - 3. willing female
estrus
what has to happen for males for copulation to occur
semen evaluation (BSE)
hypothalamus and pituitary gland
43. Urinary calculi.
Mares
stag
kidney stones also called ________ ___________ can develop in the sigmoid flexure
4 major reasons for culling dairy cows
44. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
Mares
6-8 weeks
rectal palpation (BSE)
Lutinizing Hormone in females
45. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
Sperm growth rate
femininity of a heifer
cow gestation
46. 19-23 (21) days
cow estrus cycle
scrotal circumference (BSE)
Lutinizing Hormone in females
spermatogenesis
47. 1-3 days
van deferens
feeding a high producing dairy cow
sow estrus
Brown Swiss Cow
48. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
mare's estrous cycle
Culls bulls earlier (2 reasons)
Sperm growth rate
reasons for castration
49. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Holstein Cow
vagina
cryptorchid
dartos muscle
50. 26 hours after estrus begins
Blood
rectal palpation (BSE)
ewe ovulation
elastrator
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